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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Copyright 2007,2008,2009 John C. Gunther, except that most of this<a name="line.2"></a>
<FONT color="green">003</FONT>     * GChartCanvasLite interface was extracted from GWTCanvas, a part of the<a name="line.3"></a>
<FONT color="green">004</FONT>     * GWT incubator project, which is Copyright Google, Inc. and also<a name="line.4"></a>
<FONT color="green">005</FONT>     * licenced under Apache 2.0.  <a name="line.5"></a>
<FONT color="green">006</FONT>     * <a name="line.6"></a>
<FONT color="green">007</FONT>     * Licensed under the Apache License, Version 2.0 (the<a name="line.7"></a>
<FONT color="green">008</FONT>     * "License"); you may not use this file except in compliance<a name="line.8"></a>
<FONT color="green">009</FONT>     * with the License. You may obtain a copy of the License at:<a name="line.9"></a>
<FONT color="green">010</FONT>     * <a name="line.10"></a>
<FONT color="green">011</FONT>     *  http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a>
<FONT color="green">012</FONT>     *<a name="line.12"></a>
<FONT color="green">013</FONT>     * Unless required by applicable law or agreed to in writing,<a name="line.13"></a>
<FONT color="green">014</FONT>     * software distributed under the License is distributed on an<a name="line.14"></a>
<FONT color="green">015</FONT>     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,<a name="line.15"></a>
<FONT color="green">016</FONT>     * either express or implied. See the License for the specific<a name="line.16"></a>
<FONT color="green">017</FONT>     * language governing permissions and limitations under the<a name="line.17"></a>
<FONT color="green">018</FONT>     * License.<a name="line.18"></a>
<FONT color="green">019</FONT>     */<a name="line.19"></a>
<FONT color="green">020</FONT>    package com.googlecode.gchart.client;<a name="line.20"></a>
<FONT color="green">021</FONT>      /**<a name="line.21"></a>
<FONT color="green">022</FONT>       * Defines the features of a canvas (vector graphics) widget<a name="line.22"></a>
<FONT color="green">023</FONT>       * that (once you teach GChart how to create such widgets via<a name="line.23"></a>
<FONT color="green">024</FONT>       * the &lt;tt&gt;setCanvasFactory&lt;/tt&gt; method) GChart can exploit to<a name="line.24"></a>
<FONT color="green">025</FONT>       * render your charts more quickly and with higher resolution.<a name="line.25"></a>
<FONT color="green">026</FONT>       * <a name="line.26"></a>
<FONT color="green">027</FONT>       * &lt;p&gt;<a name="line.27"></a>
<FONT color="green">028</FONT>       *<a name="line.28"></a>
<FONT color="green">029</FONT>       * Names, method signatures, and javadoc comments for this<a name="line.29"></a>
<FONT color="green">030</FONT>       * interface are mostly copied from, and a proper subset of,<a name="line.30"></a>
<FONT color="green">031</FONT>       * the GWT incubator's &lt;a<a name="line.31"></a>
<FONT color="green">032</FONT>       * href="http://code.google.com/p/google-web-toolkit-incubator/wiki/GWTCanvas"&gt;<a name="line.32"></a>
<FONT color="green">033</FONT>       * GWTCanvas widget&lt;/a&gt;. Specifically, for simplicity, features<a name="line.33"></a>
<FONT color="green">034</FONT>       * of &lt;tt&gt;GWTCanvas&lt;/tt&gt; that GChart can't exploit, such as gradients and<a name="line.34"></a>
<FONT color="green">035</FONT>       * transformations, have been omitted, and only ordinary CSS<a name="line.35"></a>
<FONT color="green">036</FONT>       * and RGBA color strings (not the special &lt;tt&gt;GWTCanvas<a name="line.36"></a>
<FONT color="green">037</FONT>       * Color&lt;/tt&gt; type) are supported.<a name="line.37"></a>
<FONT color="green">038</FONT>       * &lt;p&gt;<a name="line.38"></a>
<FONT color="green">039</FONT>       *<a name="line.39"></a>
<FONT color="green">040</FONT>       * The original &lt;tt&gt;GWTCanvas&lt;/tt&gt; code is copyright Google, Inc.  under<a name="line.40"></a>
<FONT color="green">041</FONT>       * the terms of the Apache 2.0 license.&lt;p&gt;<a name="line.41"></a>
<FONT color="green">042</FONT>       *<a name="line.42"></a>
<FONT color="green">043</FONT>       *<a name="line.43"></a>
<FONT color="green">044</FONT>       * &lt;i&gt;Tip:&lt;/i&gt; To easily bolt-on &lt;tt&gt;GWTCanvas&lt;/tt&gt; to render your<a name="line.44"></a>
<FONT color="green">045</FONT>       * charts more quickly and with higher resolution, just add the<a name="line.45"></a>
<FONT color="green">046</FONT>       * &lt;tt&gt;gwt-incubator.jar&lt;/tt&gt; to your build path, and copy the<a name="line.46"></a>
<FONT color="green">047</FONT>       * boilerplate code in the &lt;tt&gt;setCanvasFactory&lt;/tt&gt; method's<a name="line.47"></a>
<FONT color="green">048</FONT>       * javadocs into the module that contains your application's<a name="line.48"></a>
<FONT color="green">049</FONT>       * EntryPoint class. If you decide instead to use a different GWT<a name="line.49"></a>
<FONT color="green">050</FONT>       * cross-browser vector graphics widget, you can still use that<a name="line.50"></a>
<FONT color="green">051</FONT>       * boilerplate as a starting point for your own, custom, interfacing<a name="line.51"></a>
<FONT color="green">052</FONT>       * code.<a name="line.52"></a>
<FONT color="green">053</FONT>       * &lt;p&gt;<a name="line.53"></a>
<FONT color="green">054</FONT>       * <a name="line.54"></a>
<FONT color="green">055</FONT>       * &lt;small&gt; GChart requires that the background color of the<a name="line.55"></a>
<FONT color="green">056</FONT>       * canvas element as a whole be transparent (no background<a name="line.56"></a>
<FONT color="green">057</FONT>       * color).  This is needed because, to facilitate single-curve<a name="line.57"></a>
<FONT color="green">058</FONT>       * updating, GChart stitches together the canvas based<a name="line.58"></a>
<FONT color="green">059</FONT>       * rendering of a chart from a series of smaller, overlaid,<a name="line.59"></a>
<FONT color="green">060</FONT>       * canvas widgets.  Since transparent backgrounds are the<a name="line.60"></a>
<FONT color="green">061</FONT>       * default for &lt;tt&gt;GWTCanvas&lt;/tt&gt;, and likely for other GWT vector<a name="line.61"></a>
<FONT color="green">062</FONT>       * graphics widgets, you are not expected to have to do<a name="line.62"></a>
<FONT color="green">063</FONT>       * anything special to meet this requirement.  &lt;/small&gt;<a name="line.63"></a>
<FONT color="green">064</FONT>       * <a name="line.64"></a>
<FONT color="green">065</FONT>       * <a name="line.65"></a>
<FONT color="green">066</FONT>       * @see GChartCanvasFactory GChartCanvasFactory<a name="line.66"></a>
<FONT color="green">067</FONT>       * @see GChart#setCanvasFactory setCanvasFactory<a name="line.67"></a>
<FONT color="green">068</FONT>       * @see GChart.Symbol#setFillSpacing setFillSpacing<a name="line.68"></a>
<FONT color="green">069</FONT>       * @see GChart.Symbol#setFillThickness setFillThickness<a name="line.69"></a>
<FONT color="green">070</FONT>       * <a name="line.70"></a>
<FONT color="green">071</FONT>       *<a name="line.71"></a>
<FONT color="green">072</FONT>       **/<a name="line.72"></a>
<FONT color="green">073</FONT>      public interface GChartCanvasLite {<a name="line.73"></a>
<FONT color="green">074</FONT>      /**<a name="line.74"></a>
<FONT color="green">075</FONT>       * Draws an arc. If the context has a non-empty path, then the method must add a <a name="line.75"></a>
<FONT color="green">076</FONT>       * straight line from the last point in the path to the start point of the arc.<a name="line.76"></a>
<FONT color="green">077</FONT>       * <a name="line.77"></a>
<FONT color="green">078</FONT>       * @param x center X coordinate<a name="line.78"></a>
<FONT color="green">079</FONT>       * @param y center Y coordinate<a name="line.79"></a>
<FONT color="green">080</FONT>       * @param radius radius of drawn arc<a name="line.80"></a>
<FONT color="green">081</FONT>       * @param startAngle angle measured from positive X axis to start of arc CW<a name="line.81"></a>
<FONT color="green">082</FONT>       * @param endAngle angle measured from positive X axis to end of arc CW<a name="line.82"></a>
<FONT color="green">083</FONT>       * @param antiClockwise direction that the arc line is drawn<a name="line.83"></a>
<FONT color="green">084</FONT>       */<a name="line.84"></a>
<FONT color="green">085</FONT>         public void arc(double x, double y, double radius, double startAngle, double endAngle, boolean antiClockwise);<a name="line.85"></a>
<FONT color="green">086</FONT>      /**<a name="line.86"></a>
<FONT color="green">087</FONT>       * Erases the current path and prepares it for a new path.<a name="line.87"></a>
<FONT color="green">088</FONT>       */<a name="line.88"></a>
<FONT color="green">089</FONT>         public void beginPath();<a name="line.89"></a>
<FONT color="green">090</FONT>      /**<a name="line.90"></a>
<FONT color="green">091</FONT>       * Clears the entire canvas.<a name="line.91"></a>
<FONT color="green">092</FONT>       */<a name="line.92"></a>
<FONT color="green">093</FONT>         public void clear();<a name="line.93"></a>
<FONT color="green">094</FONT>      /**<a name="line.94"></a>
<FONT color="green">095</FONT>       * Closes the current path. "Closing" simply means that a line is drawn<a name="line.95"></a>
<FONT color="green">096</FONT>       * from the last element in the path back to the first.<a name="line.96"></a>
<FONT color="green">097</FONT>       */<a name="line.97"></a>
<FONT color="green">098</FONT>         public void closePath();<a name="line.98"></a>
<FONT color="green">099</FONT>      /**<a name="line.99"></a>
<FONT color="green">100</FONT>       * Fills the current path according to the current fillstyle.<a name="line.100"></a>
<FONT color="green">101</FONT>       */<a name="line.101"></a>
<FONT color="green">102</FONT>         public void fill();<a name="line.102"></a>
<FONT color="green">103</FONT>      /**<a name="line.103"></a>
<FONT color="green">104</FONT>       * Adds a line from the last point in the current path to the <a name="line.104"></a>
<FONT color="green">105</FONT>       * point defined by x and y.<a name="line.105"></a>
<FONT color="green">106</FONT>       * <a name="line.106"></a>
<FONT color="green">107</FONT>       * @param x x coord of point<a name="line.107"></a>
<FONT color="green">108</FONT>       * @param y y coord of point<a name="line.108"></a>
<FONT color="green">109</FONT>       */<a name="line.109"></a>
<FONT color="green">110</FONT>         public void lineTo(double x, double y);<a name="line.110"></a>
<FONT color="green">111</FONT>      /**<a name="line.111"></a>
<FONT color="green">112</FONT>       * Makes the last point in the current path be &lt;b&gt;(x,y)&lt;/b&gt;.<a name="line.112"></a>
<FONT color="green">113</FONT>       * <a name="line.113"></a>
<FONT color="green">114</FONT>       * @param x x coord of point<a name="line.114"></a>
<FONT color="green">115</FONT>       * @param y y coord of point<a name="line.115"></a>
<FONT color="green">116</FONT>       */<a name="line.116"></a>
<FONT color="green">117</FONT>         public void moveTo(double x, double y);<a name="line.117"></a>
<FONT color="green">118</FONT>         <a name="line.118"></a>
<FONT color="green">119</FONT>      /**<a name="line.119"></a>
<FONT color="green">120</FONT>       * Resizes the canvas.<a name="line.120"></a>
<FONT color="green">121</FONT>       * <a name="line.121"></a>
<FONT color="green">122</FONT>       * @param width width of canvas drawing area in pixels<a name="line.122"></a>
<FONT color="green">123</FONT>       * @param height height of canvas drawing area in pixels<a name="line.123"></a>
<FONT color="green">124</FONT>       * <a name="line.124"></a>
<FONT color="green">125</FONT>       */<a name="line.125"></a>
<FONT color="green">126</FONT>         public void resize(int width, int height);<a name="line.126"></a>
<FONT color="green">127</FONT>      /**<a name="line.127"></a>
<FONT color="green">128</FONT>       * Set the current Fill Style to the specified color.<a name="line.128"></a>
<FONT color="green">129</FONT>       * &lt;p&gt;<a name="line.129"></a>
<FONT color="green">130</FONT>       * <a name="line.130"></a>
<FONT color="green">131</FONT>       * Whenever GChart uses canvas to fill-in a symbol's interior (e.g.<a name="line.131"></a>
<FONT color="green">132</FONT>       * the interior part, excluding the border, of a solid-fill pie<a name="line.132"></a>
<FONT color="green">133</FONT>       * slice), it passes the symbol's canvas fill style string (which is<a name="line.133"></a>
<FONT color="green">134</FONT>       * specified via &lt;tt&gt;Symbol.setBackgroundColor&lt;/tt&gt;) to this method.<a name="line.134"></a>
<FONT color="green">135</FONT>       * It then uses the &lt;tt&gt;fill&lt;/tt&gt; method of this interface to fill in<a name="line.135"></a>
<FONT color="green">136</FONT>       * the symbol's interior with this color.<a name="line.136"></a>
<FONT color="green">137</FONT>       * <a name="line.137"></a>
<FONT color="green">138</FONT>       * &lt;p&gt;<a name="line.138"></a>
<FONT color="green">139</FONT>       *<a name="line.139"></a>
<FONT color="green">140</FONT>       * Your method should be able to handle any color specification<a name="line.140"></a>
<FONT color="green">141</FONT>       * string likely to be passed into<a name="line.141"></a>
<FONT color="green">142</FONT>       * &lt;tt&gt;Symbol.setBackgroundColor&lt;/tt&gt;, see that method for full<a name="line.142"></a>
<FONT color="green">143</FONT>       * details for the kinds of strings that are supported.<a name="line.143"></a>
<FONT color="green">144</FONT>       * <a name="line.144"></a>
<FONT color="green">145</FONT>       * @see GChart.Symbol#setBackgroundColor setBackgroundColor<a name="line.145"></a>
<FONT color="green">146</FONT>       * @see #fill fill<a name="line.146"></a>
<FONT color="green">147</FONT>       * <a name="line.147"></a>
<FONT color="green">148</FONT>       * @param canvasFillStyle the fill style specification string. You may<a name="line.148"></a>
<FONT color="green">149</FONT>       * assume that GChart will pass you either a standard CSS color<a name="line.149"></a>
<FONT color="green">150</FONT>       * specification string, or an RGBA extension of this<a name="line.150"></a>
<FONT color="green">151</FONT>       * standard CSS format, such as &lt;tt&gt;rgba(255,255,255,0.5)&lt;/tt&gt;.<a name="line.151"></a>
<FONT color="green">152</FONT>       * <a name="line.152"></a>
<FONT color="green">153</FONT>       */<a name="line.153"></a>
<FONT color="green">154</FONT>         public void setFillStyle(String canvasFillStyle);<a name="line.154"></a>
<FONT color="green">155</FONT>      /**<a name="line.155"></a>
<FONT color="green">156</FONT>       * Sets the current context's linewidth. Line width is the thickness<a name="line.156"></a>
<FONT color="green">157</FONT>       * of a stroked line.<a name="line.157"></a>
<FONT color="green">158</FONT>       * &lt;p&gt;<a name="line.158"></a>
<FONT color="green">159</FONT>       *<a name="line.159"></a>
<FONT color="green">160</FONT>       * GChart will obtain the width's passed into this method from those<a name="line.160"></a>
<FONT color="green">161</FONT>       * specified by the &lt;tt&gt;Symbol.setBorderWidth&lt;/tt&gt; method (which<a name="line.161"></a>
<FONT color="green">162</FONT>       * defines the widths of stroked borders around any canvas-rendered<a name="line.162"></a>
<FONT color="green">163</FONT>       * line, area, or pie-slice chart elements) and from the<a name="line.163"></a>
<FONT color="green">164</FONT>       * &lt;tt&gt;Symbol.setFillThickness&lt;/tt&gt; method (which defines the<a name="line.164"></a>
<FONT color="green">165</FONT>       * thickness of a line chart's connecting lines). <a name="line.165"></a>
<FONT color="green">166</FONT>       * <a name="line.166"></a>
<FONT color="green">167</FONT>       * &lt;p&gt;<a name="line.167"></a>
<FONT color="green">168</FONT>       *<a name="line.168"></a>
<FONT color="green">169</FONT>       * @see GChart.Symbol#setBorderWidth setBorderWidth<a name="line.169"></a>
<FONT color="green">170</FONT>       * @see GChart.Symbol#setFillThickness setFillThickness<a name="line.170"></a>
<FONT color="green">171</FONT>       * <a name="line.171"></a>
<FONT color="green">172</FONT>       * @param width the width of the stroked line, in pixels<a name="line.172"></a>
<FONT color="green">173</FONT>       */<a name="line.173"></a>
<FONT color="green">174</FONT>         public void setLineWidth(double width);<a name="line.174"></a>
<FONT color="green">175</FONT>      /**<a name="line.175"></a>
<FONT color="green">176</FONT>       * Set the current Stroke Style to the specified color.<a name="line.176"></a>
<FONT color="green">177</FONT>       *<a name="line.177"></a>
<FONT color="green">178</FONT>       * &lt;p&gt;<a name="line.178"></a>
<FONT color="green">179</FONT>       * <a name="line.179"></a>
<FONT color="green">180</FONT>       * GChart will obtain the color strings passed into this method<a name="line.180"></a>
<FONT color="green">181</FONT>       * from those specified by the &lt;tt&gt;Symbol.setBorderColor&lt;/tt&gt;<a name="line.181"></a>
<FONT color="green">182</FONT>       * method. You can assume that these strings will be either in<a name="line.182"></a>
<FONT color="green">183</FONT>       * standard CSS or the extended RGBA format, see<a name="line.183"></a>
<FONT color="green">184</FONT>       * &lt;tt&gt;Symbol.setBorderColor&lt;/tt&gt; for full details.  These<a name="line.184"></a>
<FONT color="green">185</FONT>       * colors will become the colors of the stroked borders around<a name="line.185"></a>
<FONT color="green">186</FONT>       * any canvas-rendered line, area, or pie-slice chart elements.<a name="line.186"></a>
<FONT color="green">187</FONT>       *<a name="line.187"></a>
<FONT color="green">188</FONT>       * <a name="line.188"></a>
<FONT color="green">189</FONT>       * &lt;p&gt;<a name="line.189"></a>
<FONT color="green">190</FONT>       * <a name="line.190"></a>
<FONT color="green">191</FONT>       * @see GChart.Symbol#setBorderColor setBorderColor<a name="line.191"></a>
<FONT color="green">192</FONT>       * @see #stroke stroke<a name="line.192"></a>
<FONT color="green">193</FONT>       * <a name="line.193"></a>
<FONT color="green">194</FONT>       * @param canvasStrokeStyle the stroke style specification string.<a name="line.194"></a>
<FONT color="green">195</FONT>       * You may assume that, during rendering, GChart will pass you either<a name="line.195"></a>
<FONT color="green">196</FONT>       * a standard CSS color specification string, or an RGBA<a name="line.196"></a>
<FONT color="green">197</FONT>       * extension of this standard CSS format such as<a name="line.197"></a>
<FONT color="green">198</FONT>       * &lt;tt&gt;rgba(255,255,255,0.5)&lt;/tt&gt; for semi-transparent white.<a name="line.198"></a>
<FONT color="green">199</FONT>       * <a name="line.199"></a>
<FONT color="green">200</FONT>       * <a name="line.200"></a>
<FONT color="green">201</FONT>       */<a name="line.201"></a>
<FONT color="green">202</FONT>         public void setStrokeStyle(String canvasStrokeStyle);<a name="line.202"></a>
<FONT color="green">203</FONT>      /**<a name="line.203"></a>
<FONT color="green">204</FONT>       * Strokes the current path according to the current stroke style.<a name="line.204"></a>
<FONT color="green">205</FONT>       */<a name="line.205"></a>
<FONT color="green">206</FONT>         public void stroke();<a name="line.206"></a>
<FONT color="green">207</FONT>      }<a name="line.207"></a>
<FONT color="green">208</FONT>    <a name="line.208"></a>




























































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